CO conversion treatment device in coke-oven gas and conversion treatment method thereof

A conversion treatment, coke oven gas technology, applied in the direction of steam generation method, removal of gas pollutants, and catalytic treatment of combustible gas, etc., can solve the problem of affecting the output of chemical products, the scale of products cannot be adjusted in time, and the economic level of device operation impact and other issues, to achieve the effect of reducing energy consumption and equipment investment, increasing operational flexibility, and reducing the number of equipment

Inactive Publication Date: 2021-06-18
山西沃能化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) Product gas LNG, H 2 , CO and other component ratios cannot be adjusted
The first limitation of method three is that the upstream coke oven gas components fluctuate, which will affect the output of chemical products such as LNG, methanol, and ethylene glycol. Second, when the price of chemical products is affected by market changes, the product scale cannot be adjusted in time, resulting in the operation Economic level is affected
[0005] (3) Large investment in equipment
Method 1 and method 2 require the construction of coke oven gas reforming equipment, air separation oxygen production and other equipment, and the equipment investment is relatively large

Method used

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  • CO conversion treatment device in coke-oven gas and conversion treatment method thereof

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Effect test

Embodiment 1

[0032] like figure 1 As shown, a CO conversion treatment device in coke oven gas is installed at the outlet of the desulfurization tank of the coke oven gas deoxygenation fine desulfurization device, including a steam drum 1, an isothermal conversion furnace 2, a cooling humidifier 3, and a heat exchanger for entering and exiting materials 4. 0.5MPa waste pot 5, water cooler 6, the cooling humidifier 3 is used to mix the coke oven gas from the deoxygenation and fine desulfurization unit with the boiler water from the utility installation, the cooling humidifier 3 The outlet is connected to the inlet of the isothermal heat exchange furnace 2, and the first outlet of the isothermal heat exchange furnace 2 is connected to the rising pipe of the steam drum 1, which is used to combine the reaction heat generated in the isothermal heat exchange furnace 2 with the hot water in the tube side The heat exchange is sent to the steam drum 1, the steam drum 1 receives the medium-pressure b...

Embodiment 2

[0034] A method for utilizing the device described in Embodiment 1 to convert and treat CO in coke oven gas, comprising the following steps:

[0035] Step 1, the raw coke oven gas passes through the crude desulfurization device, the benzene and naphthalene removal device, and then enters the deoxygenation and fine desulfurization device after being heated by the incoming and outgoing material heat exchanger 4;

[0036] Step 2, the coke oven gas from the deoxygenation fine desulfurization unit and the boiler water sent by the public works unit enter the cooling humidifier 3, and its coke oven gas volume (raw gas) is 100000Nm 3 / h, the raw material gas pressure is 3.2MPaG, the raw material gas temperature is 275°C, the main component of the raw material gas is CO: volume concentration 7%, total sulfur: 0.1ppm, O 2: 10ppm, the flow rate of its boiler water is 3.5t / h, the coke oven gas is mixed with the boiler water in the cooling humidifier 3 to obtain 190°C cooling and saturated...

Embodiment 3

[0042] A method for utilizing the device described in Embodiment 1 to convert and treat CO in coke oven gas, comprising the following steps:

[0043] Step 1, the raw coke oven gas passes through the crude desulfurization device, the benzene and naphthalene removal device, and then enters the deoxygenation and fine desulfurization device after being heated by the incoming and outgoing material heat exchanger 4;

[0044] Step 2, the coke oven gas from the deoxygenation fine desulfurization unit and the boiler water sent by the public works unit enter the cooling humidifier 3, and its coke oven gas volume (raw gas) is 100000Nm 3 / h, the raw material gas pressure is 3.3MPaG, the raw material gas temperature is 285°C, the main component of the raw material gas is CO: volume concentration 7%, total sulfur: 0.1ppm, O 2 : 10ppm, the flow rate of its boiler water is 4t / h, the coke oven gas is mixed with the boiler water in the cooling humidifier 3, and the coke oven gas of 200 ℃ coolin...

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Abstract

The invention belongs to the field of coke-oven gas purification, and particularly relates to a CO conversion treatment device in coke-oven gas and a conversion treatment method thereof The CO conversion treatment device is arranged at an outlet of a desulfurization tank of a coke-oven gas deoxidization and fine desulfurization device and comprises a steam pocket, an isothermal conversion furnace, a cooling humidifier, a material inlet and outlet heat exchanger, a 0.5 MPa waste heat boiler and a water cooler. According to the method, the molar ratio of coke-oven gas to boiler water is controlled by adjusting the amount of boiler water sprayed by the cooling humidifier, so that the effect of controlling the conversion rate is achieved; and according to coke-oven gas components and shift catalyst operation process conditions, a copper shift catalyst is selected, a heat exchanger does not need to be arranged at an inlet of an isothermal shift converter, and heat coupling utilization of a deoxidization fine desulfurization device and a shift treatment device is achieved.

Description

technical field [0001] The invention belongs to the field of coke oven gas purification, and in particular relates to a CO conversion treatment device in coke oven gas and a conversion treatment method thereof. Background technique [0002] Coke oven gas is a by-product of the coking process. The main components of coke oven gas are hydrogen 60-62%, nitrogen 2.5-4.5%, methane 20-22%, carbon monoxide 7-8%, carbon dioxide 2-3%, ethylene At present, coke oven gas is mainly used as fuel gas and raw material gas for chemical products. The raw coke oven gas undergoes front-end pretreatment to remove tar, benzene, hydrogen sulfide and other impurities in the gas, and then undergoes compression and boosting to further deeply purify and remove tar, benzene, naphthalene, sulfur, oxygen and other impurities in the coke oven gas. There are three main treatment processes for the purified raw coke oven gas at this stage. The first way is to convert coke oven gas methane into CO and H 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/00C10K3/04F22B1/00F22D1/00
CPCC10K1/004C10K1/002C10K3/04F22D1/00F22B1/00Y02P20/10Y02P20/129
Inventor 师少杰
Owner 山西沃能化工科技有限公司
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